Description
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | ALSTOM |
| Model | AH116-2 |
| Product Type | Analog Input Module |
| System | ALSPA CE3000 / CE2000 |
| Number of Channels | 8 |
| Input Signal | 4–20 mA / 0–10 V |
| Application | Process measurement / control |
| Installation | ALSPA controller/I/O architecture |
| Communication | System backplane dependent |
| Resolution | Verify against exact hardware documentation |
| Accuracy | Verify against applicable calibration documentation |
| Isolation | Verify exact module variant |
| Power Consumption | Verify exact hardware revision |
| Firmware | Module software version ≥ 1.0 documented |
| Operating Temperature | Verify from OEM documentation |
The CE3000 technical register also separately identifies AH116-2 module software, with a documented minimum software version of 1.0.
Product Introduction
The ALSTOM AH116-2 is an eight-channel analog input module belonging to the CE3000 family of field input/output modules. Its role is to acquire analog signals from field instrumentation and provide those values to the controller for monitoring, regulation, and control functions. The documented signal types include 4–20 mA and 0–10 V inputs.
The ALSTOM AH116-2 should therefore be treated as an I/O component rather than a CPU, servo drive, or general-purpose control board. This is important because several secondary websites currently describe AH116-2 as a servo drive or VME control board. Those descriptions conflict with the CE3000 technical register, which specifically identifies AH116-2 as an 8-channel analog input module.
For legacy ALSTOM installations, the module can form part of a larger CE3000 control architecture in which analog process measurements are acquired at the field level and passed into the controller for further processing.
AH116-2
Main Features & Field Considerations
Eight analog input channels
provides eight analog input channels, allowing multiple process measurements to be acquired through a single I/O module. The documented CE3000 classification explicitly identifies it as an 8-channel analog input module.
4–20 mA and 0–10 V signals
The available part-specific technical reference associates the module with conventional industrial analog signal ranges, including 4–20 mA and 0–10 V.
system integration
is not a standalone analog acquisition device. Its practical operation depends on the host ALSTOM controller, I/O architecture, module configuration, and engineering software.
Revision and software compatibility
The register lists separa, , and AH116A-2 variants and specifies software requirements for the individual modules. This is a good reason to match the exact suffix rather than substituting a visually similar -family board.
Field signal verification
When replacing the module, confirm whether each channel is configured for current or voltage input. A wiring or configuration mismatch can produce plausible-looking but incorrect process values.
Replacement Checks
Before replacing an , verify:
- Exact model:
- Host system: /CE2000
- Eight-channel configuration
- Current versus voltage input configuration
- 4–20 mA / 0–10 V wiring
- Sensor/transmitter type
- Channel assignment
- Engineering scaling
- Hardware revision
- Module software/firmware
- Rack and backplane compatibility
- Existing calibration values
For 4–20 mA loops, also check transmitter supply, loop resistance, polarity, and field termination before concluding that the replacement module is defective.
Important Specification Caution
There is substantial misinformation surroundie online. One listing calls it a Watlow/ALSTOM servo drive and assigns CAN-BUS, RS-485, Ethernet, and motion-control functions; another calls it a VME pulse PCB. These descriptions are not consistent with the technical register.
I would therefore not publish claims of servo-motor control, 150 Hz output, Ethernet/IP, Modbus, CAN, VME operation, or railway TCMS application for this spc without additional OEM documentation. The stronger evidence supports the 8-channel analog-input classification.
Procurement Note
Use the following description when sourcing:
M — 8-Channel Analog Input Module, 4–20 mA / 0–10 V
The key distinction is veAH116-1/AH116A-2. These are separate module variants in the documentation, so the complete suffix should be retained when ordering.
For a plant replacement, match the exact module revision, input configuration, channel scaling, and software configuration rather than relying on generic marketplace descriptions.
